CS210573B1 - Regenerative binder for roadway maintenance - Google Patents

Abstract

The invention relates to the field of production of bituminous materials for the maintenance of road surfaces and other types of roads and surfaces. It solves the problem of protection, maintenance and regeneration of road surfaces in weak structural layers. The essence of the invention is the design of a composition of a regenerative binder for the above-mentioned uses, as a mixture of air-blown petroleum asphalts with a softening point of 70 to 130 °C, hydrocarbon diluents and additives for improving adhesion to wet and acidic aggregates and concrete surfaces of cationic or anionic type. The regenerative bituminous binder of the proposed composition meets the requirements for successful use for the maintenance of asphalt and concrete road surfaces and other surfaces of this type.

Description

The invention solves the composition of the regenerative binder for the maintenance of roadways as a mixture of air-blown petroleum bitumen, with a softening point KK of 70 to 130 ° C, hydrocarbon diluents and additives for improving adhesion to wet and acidic aggregates and concrete surfaces.

The extensive damage that has occurred on bituminous roads of all types in recent years is the result of ever-increasing traffic density and loads. The causes of cracks on the road surface are different, but always lead to permanent damage to the road construction.

The remedial means are regular preventive, systematic maintenance of the pavement surface because during the first phase operation the pavement surface is damaged due to aging of the material and poor connection of individual grains of aggregate with bitumen. As a result, cracks appear on the pavement surface, the surface remains free of bituminous binder and, if the bituminous surface of the pavement is not protected quickly, destruction and other serious road damage occur very quickly.

Therefore, today there are a number of methods and materials in the world to protect the bituminous road surface already at an early stage of damage,

The more well-known method of performing a new bituminous pavement of less thickness is, due to its laboriousness and disadvantageous economy, still being replaced by methods and materials that protect the pavement surface in the form of thin coatings. All these methods are based on the use of bituminous materials in various forms and qualities, which is then decisive for their strengths and shortcomings. These are asphalt coatings with diluted road bitumen emulsions, slurry seals made with bitumen emulsions and more recently the "Gil-baind" method. Gil-baind is a blend of Gilzonite natural asphalt mined in the USA, plasticizers, thinners and additives. This material is applied to the road by brushing or spraying, followed by aggregate and rolling. · Laboratory tests and analyzes and experience gained abroad show that this paint is a very suitable material for roadway maintenance.

Also for the USSR conditions, a binder of a similar type is very desirable, since its use is much simpler than the sludge coverings performed so far by cationic emulsions. However, the basic component of "Gil-balnd" - natural asphalt Gilzonite, which is mined in the US is practically unavailable and is therefore sought to replace it with another available material with similar properties and to adapt the overall binder composition so that its parameters meet the conditions for maintenance of all types of roadways.

The problem described is solved by the proposed regenerative binder for roadway maintenance, characterized by the use of asphalt obtained from petroleum having a softening point of 70 to 130 ° 0 prepared by air blowing and hydrocarbon diluents such as white spirit, aromatic hydrocarbons or white spirit-aromatic hydrocarbon blend.

A solution containing 30-60 wt. % blown asphalt and up to 69.95 wt. % hydrocarbon diluent. Good adhesion of the binder to the acid aggregate of wet aggregates and concrete surfaces is ensured by the addition of 0.05-5% of anion- or catlon-active type adhesive, such as fatty acids, fatty acid esters, alkylamines, aoylaminoamides, substituted alkyllmidazolines, S-alkylpolypropylenepolyamines,

210 573, which was sufficiently proved by laboratory and practical tests.

From these tests it is also evident that the regenerating bituminous binder of the proposed composition meets the prerequisites of successful use for the maintenance of asphalt and concrete roadways, cost savings and foreign exchange for the potential import of "Gil-baindu" at the manufacturer then a more comprehensive appreciation of crude oil.

In the following examples, the specific composition of the regenerative bituminous binder of the invention is shown.

Example 1

The regenerating bitumen binder for road maintenance is prepared as follows.

Asphalt oxidized brittle - A0K-90 45% by weight white spirit 54 »3% by weight techn. 1- (betaaminoethyl) -2-alkyl imidazoline 2 (TEKA) 0.7 wt%

The resulting binder has a flow time c5 / 25 * 0 8.-15 »and perfect adhesion to acid and wet aggregates. Example 2

Asphalt oxidized building-insulation AOSI 85/25 47 »0% by weight white spirit 47,3% by weight xylene techn. 5.0 wt%

R-albylpolypropylenediamine (Ostanizol) 0.7 wt.%

The resulting binder has a flow time c5 / 25 ° C of 10 - 30 s and good adhesion to all types of dry and wet aggregates.

Example 3

Asphalt semi-blown AP-15 45 wt.% White spirit 53.0 wt.% Montan wax crude 2.0 wt.%

The resulting binder has a flow time of 5/25 ° C of 5-15 seconds and good adhesion to all concrete surfaces.

Example 4

Asphalt oxidized building insulation AOSI 85/25 white spirit xylene techn. acylaminoamide

47.0 wt% 47.0 wt%

5.0 wt% 1.0 wt%

The resulting binder has a flow time c5 / 25 ° 0 of 10 - 30 s and good adhesion especially to acid and wet aggregates.

Claims (2)

Object of the invention CLAIMS 1. Regenerative bituminous binder for roadway maintenance, characterized in that it contains 30 to 60 wt. % of blown asphalt with a softening point KK of 70 to 130 ° G; and 35 to 69.95 wt. % hydrocarbon diluents such as white spirit, aromatic hydrocarbons boiling in the range of 100 to 220 ° C or mixtures thereof with white spirit and 0.05 to 5 wt. % an adhesive of anionic or cationic type. 2. The regenerative binder of claim 1, wherein the anionic-type adhesive ingredients are fatty acids, fatty acid esters, fatty acid and cationic-type distillation residues, alkylamines, acylaminoamides, substituted alkylimidazolines, N-alkylpolypropylene polyamines.